<template>
  <div>
    <div style="margin: 10px 0">
      <el-input style="width: 200px" placeholder="请输入名称" suffix-icon="el-icon-search" v-model="name"></el-input>
      <el-button class="ml-5" type="primary" @click="load">搜索</el-button>
      <el-button type="warning" @click="reset">重置</el-button>
    </div>
    <div style="margin: 10px 0">
      <el-upload action="http://localhost:9090/file/upload" :show-file-list="false" :on-success="handleFileUploadSuccess" style="display: inline-block">
        <el-button type="primary" class="ml-5">上传文件 <i class="el-icon-upload"></i></el-button>
      </el-upload>
      <el-popconfirm
          class="ml-5"
          confirm-button-text='确定'
          cancel-button-text='我再想想'
          icon="el-icon-info"
          icon-color="red"
          title="您确定批量删除这些数据吗？"
          @confirm="delBatch"
      >
        <el-button type="danger" slot="reference">批量删除 <i class="el-icon-remove-outline"></i></el-button>
      </el-popconfirm>

    </div>
    <el-table :data="tableData" border stripe :header-cell-class-name="'headerBg'"  @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55"></el-table-column>
      <el-table-column prop="id" label="ID" width="80"></el-table-column>
      <el-table-column prop="user" label="归属人" width="80"></el-table-column>
      <el-table-column prop="name" label="文件名称"></el-table-column>
      <el-table-column prop="type" label="文件类型"></el-table-column>
      <el-table-column prop="size" label="文件大小(kb)"></el-table-column>
      <el-table-column label="预览" align="center">
        <template slot-scope="scope" >
          <el-button type="primary" @click="preview(scope.row.url)">预览&nbsp;<i class="el-icon-picture-outline"></i></el-button>
        </template>
      </el-table-column>
      <el-table-column label="下载" align="center">
        <template slot-scope="scope">
          <el-button type="primary" @click="download(scope.row.url,scope.row.id)" >下载&nbsp;<i class="el-icon-download"></i></el-button>
        </template>
      </el-table-column>
      <el-table-column label="操作"  width="200" align="center">
        <template slot-scope="scope">
          <el-popconfirm
              class="ml-5"
              confirm-button-text='确定'
              cancel-button-text='我再想想'
              icon="el-icon-info"
              icon-color="red"
              title="您确定删除吗？"
              @confirm="del(scope.row.id)"
          >
            <el-button type="danger" slot="reference">删除 <i class="el-icon-remove-outline"></i></el-button>
          </el-popconfirm>
        </template>
      </el-table-column>
      <el-table-column label="启用" v-if="user.role === 'ROLE_ADMIN'">
        <template slot-scope="scope">
          <el-switch v-model="scope.row.enable" active-color="#13ce66" inactive-color="#ccc" @change="changeEnable(scope.row)"></el-switch>
        </template>
      </el-table-column>
    </el-table>

    <div style="padding: 10px 0">
      <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="pageNum"
          :page-sizes="[2, 5, 10, 20]"
          :page-size="pageSize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total">
      </el-pagination>
    </div>

    <el-dialog title="预览卡片" :visible.sync="dialogFormVisible" width="40%" >
      <img v-if="url" :src="url" title="文件不是图片或图片已损坏" class="avatar" width="300px" height="300px" style="padding: 10px;border: 5px solid black">
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogFormVisible = false">取 消</el-button>
      </div>
    </el-dialog>

  </div>
</template>

<script>
export default {
  name: "File",
  data(){
    return {
      tableData: [],
      total: 0,
      pageNum: 1,
      pageSize: 10,
      name: "",
      multipleSelection: [],
      dialogFormVisible: false,
      url:"",
      user: localStorage.getItem("user") ? JSON.parse(localStorage.getItem("user")) : {}
    }
  },
  created() {
    this.load()
  },
  methods: {
    load() {
      // 详情请看main.js
      this.request.get("/file/page", {
        params: {
          pageNum: this.pageNum,
          pageSize: this.pageSize,
          name: this.name,
        }
      }).then(res => {
        console.log(res)
        this.tableData = res.data.records;
        this.total = res.data.total
      })
    },
    reset() {
      this.name = ""
      this.load()
    },
    delBatch(){
      let ids = this.multipleSelection.map(v => v.id)  // [{}, {}, {}] => [1,2,3]
      this.request.post("/file/del/batch",ids)  // 这里使用delete会报错
          .then(res => {
            if (res.data) {
              this.$message.success("批量删除成功")
              this.pageNum = 1
              this.load()
            } else {
              this.$message.error("批量删除失败")
            }
          })
    },
    handleFileUploadSuccess(res){
      console.log(res)
      this.load()
      this.$message.success("上传成功")
    },
    handleSizeChange(pageSize) {
      console.log(pageSize)
      this.pageSize = pageSize
      this.load()
    },
    handleCurrentChange(pageNum) {
      console.log(pageNum)
      this.pageNum = pageNum
      this.load()
    },
    handleSelectionChange(val){
      console.log(val)
      this.multipleSelection = val
    },
    changeEnable(row){
      this.request.post("/file/update", row).then(res => {
        if (res.code === '200') {
          this.$message.success("操作成功")
        }else{
          this.$message.error("操作失败")
        }
      })
    },
    download(url,id) {
      this.request.get('/file/'+url.replace("http://localhost:9090/file/","")+'/'+id).then(res => {
        if (res.code === '600'){
          this.$message.error(res.msg)
        }
        else{
          window.open(url)
        }
      })
    },
    preview(url){
      this.dialogFormVisible = true
      this.url = url
    },
    del(id){
      this.request.delete("/file/" + id).then(res =>{
        if (res.data) {
          this.$message.success("删除成功")
          this.pageNum = 1
          this.load()
        } else {
          this.$message.error("删除失败")
        }
      })
    },
  }
}
</script>

<style scoped>
.headerBg {
  background: #eee!important;
}
</style>